stainless steel pipe,seamless pipe Type:round,square,rectangular Standard:ASTM,A554,A269 Grade:201,304,202,301,316,316L stainless steel pipes, seamless pipe: Standard:ASTM,A554,A269Grade: ... 73,76,81,102,114,133,141,159,219 Square pipes-Outside dimentions(mm)12x12,15x15,17x17,18x18, ... 28x28,30x30,36x36,38x38,40x40,50x50,60x60,70x70,80x80 Rectangular pipes-Outside dimentions(mm)20x10,23x11,24x12,25x13, ...